# Experimental Study of Water Hammer Pressure in a Commercial Pipe

Save this PDF as:

Size: px
Start display at page:

Download "Experimental Study of Water Hammer Pressure in a Commercial Pipe"

## Transcription

1 IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) Experimental Study of Water Hammer Pressure in a Commercial Pipe Ashish Kumar Patel 1 1 (School of Mechanical Engineering, Lovely Professional University, India) ABSTRACT : Water hammer is a phenomenon caused by change in flow velocity and valve closing/opening time. It is undesirable. It causes because pressure transient in the pipe, vibration and noise. Excessive pressure causes pipe fracture by rupture. A review of literature has shown that earlier researchers concentrated more on the analysis of water hammer by method of characteristic while comparative study of method of water hammer analysis is insufficient. In the present study experimental and analytical analysis of water hammer pressure in a commercial pipe has been studied and analyzed. Method of characteristic (MOC), arithmetic method, theoretical method and experimental method are used in this thesis. In MOC, an element-wise definition is used for all the devices that may be used in a pipeline system and the corresponding equations are derived in an element-wise manner. The proper equations defining the behavior of each device including pipes are derived and assembled to form the final system of equations to be solved for the unknown nodal heads. Used method allows for any arbitrary combination of devices in the pipeline system. MOC was concluded it is superior to other methods. Keywords: flow control valve, pipeline system and valve closing time/valve opening time. I. INTRODUCTION 1.1 WATER HAMMER Transient flow is the transition from one steady state to another steady state in a fluid flow system. Transient flow occurs in all fluids, confined and unconfined. A transition is caused by a disturbance to the flow. In a confined system, such as a water pipeline, an abrupt change to the flow that causes large pressure fluctuations is called water hammer. The name comes from the hammering sound the sometimes occurs during the phenomenon. The water hammer phenomenon is an important consideration in design in many hydraulic structures due to extreme variations in pressure it causes. For example, the dramatic pressure rise can cause pipes to rupture. Accompanying the high pressure wave, there is a negative wave, which is often overlooked, can cause very low pressures leading to the possibility of contaminant intrusion. Water hammer is a common but serious problem in residential plumbing systems. It puts potentially damaging extra stress and strain on pipes, joints, and fixtures. The noise associated with water hammer can be a nuisance as well. 1. EFFECT OF WATER HAMMER ON THE PIPE Rapid pressure changes are a result of rapid changes in flow, which generally occur in a pipe system after pump shut-off, although it may also occur at pump start or at valve opening or closing. Because of the compressibility of water and the elasticity of pipes, pressure waves will then propagate in the pipe until they are attenuated at a velocity, which is dependent upon pipe material and wall thickness. The effects of the water hammer vary, ranging from slight changes in pressure and velocity to sufficiently high pressure or vacuum through to failure of fittings, and burst pipes. Figure 1 shows burst castiron pipe due to water hammer pressure. This pipe thickness and pipe material is not sufficient to sustain the water hammer pressure. Therefore pipe burst. J. Izquierdo and Iglesias, (1) developed a suitable mathematical modeling of the different ingredient in hydraulic system is necessary to get, useful results, which help fulfill these objectives. In this paper mathematical modeling used to develop computer program to simulate the hydraulic transient in simple pipe. The calculations are typically very time-consuming and depending on characteristics of the system very complicated and difficult to organize. 1 Page

2 IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) Fig. 1: Cast iron pipe broken from water hammer J. Izquierdo and Iglesias, (3) developed the mathematical model described is generalized to complex pressurized hydraulic systems. To model the behavior of the fluid within the ducts, use is made of the so-called elastic model, which is numerically solved by the methods of characteristics. The main objective of this paper hinges on the treatment of the boundary conditions that allow developing a general model virtually representing every combination of elements at a given location of the system. Bergant and Simpson, () observed that water hammer with column separation from the discovery of the phenomenon in the late 19 th century, the recognition of its danger in the 193s, the development of numerical methods in the 19s and 197s, to the standard models used in commercial software packages in the late th century. A comprehensive survey of laboratory tests and field measurements is given. The review focuses on transient vaporous cavitation. Gaseous cavitation and steam condensation are beyond the scope of the paper. II. EXPERIMENTAL METHODOLOGY. 1 EXPERIMENTAL SETUP The general layout of experimental setup is shown in figure. The setup consists of reservoir, pipe line, valve, discharge tank, water level indicator and u-tube mercury manometers. A constant head 9m at reservoir of volume m 3 is available from datum line. Water flows from the reservoir to the valve through the connecting pipe line of diameter 5cm. The measuring tank is been installed for measurements of velocity at different closing/opening of valve conditions. A u-tube manometer (height of m) is been installed at the upstream of the valve at different pipe locations. Right limb of manometer is connected to pipe and another limb of manometer is opened to atmosphere.. EXPERIMENTAL PROCEDURE First find out manometer height (both left and right limb) when valve was fully opened, and calculated pressure inside the pipe. And also measured velocity by direct discharge method. Note down the manometer height (both left and right limb) for the 5% closure and calculated pressure inside the pipe line. Then Water hammer pressure is been calculated from the measured values. And also measured velocity by direct discharge method at 5% of valve closing. Same procedure is been followed for the 5%, 75%, and 1% valve closing and got water hammer pressure at different valve closing conditions. Same procedure is been followed for the %, 5%, 5%, 75%, and 1% valve opening and got water hammer pressure at different valve opening conditions 17 Page

3 WHP (m. of wc ) IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) Fig. : Experimental setup. III. RESULTS The present chapter presents the graphical representation of experimental data and analytical data. All the water hammer pressure analysis considered in the present work has been computed from measured data and are plotted against different percentage of valve closing/opening. 3.1 VARIATION OF WATER HAMMER PRESSURE ALONG THE PIPELINE Figure 3 shows the variation of water hammer pressure along the pipeline measured by manometer at upstream of the valve at different percentage of valve closing. This fig shows water hammer pressure remains constant along the pipeline. It is because time taken by the water hammer wave for reaching the reservoir and coming back to valve L/a =.7 sec. is too small and manometer reading cannot be taken in such a small time. Concluded that manometer is not accurate device for the study of water hammer pressure % 5% 75% 1% Away from the valve (cm) Fig. 3: Variation of water hammer pressure along the pipeline 3. VARIATION OF WATER HAMMER PRESSURE ALONG THE PERCENTAGE OF VALVE CLOSING Figure shows the variation of water hammer pressure along the percentage of valve closing. Here valve closing time is.3sec,.5sec,.sec, and.7sec for 5%, 5%, 75%, and 1% of valve closing respectively. Various methods to find out water hammer pressure have been compared. In this Fig. graph represents arithmetic WHP, method of characteristic WHP, theoretical WHP, and experimental WHP. This Fig. shows good agreement of the arithmetic method, method of characteristic (MOC) and theoretical method to each other at 5%, 5%, 75%, and 1% of valve closing. However experimental results agree reasonably well from the theoretical and analytical analysis. This is expected that mercury manometer is not accurate device for water hammer studies. In case of different percentage of valve closing positive water hammer pressure generated. 1 Page

4 WHP (m. of wc ) WHP (m. of wc ) IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) % of valve closing Fig. : Variation of water hammer pressure along the percentage of valve closing 3.3 VARIATION OF WATER HAMMER PRESSURE ALONG THE PERCENTAGE OF VALVE CLOSING FOR THE ANOTHER SET OF VALVE CLOSING TIME Figure 5 shows the variation of water hammer pressure along the percentage of valve closing. Here experiments carried out for another set of valve closing time. Valve closing time is.9sec, 1.sec,.1sec, and.5sec for 5%, 5%, 75%, and 1% of valve closing respectively. In this fig. graph represents arithmetic WHP, experimental WHP, method of characteristic WHP, and theoretical WHP. This figure shows good agreement of the experimental method, method of characteristic and theoretical method to each other at 5%, 5%, 75%, and 1% of valve closing. It has been concluded that arithmetic method does not show the good agreement with results obtained from the other methods. It implies that the arithmetic method is not suitable for very slow valve closer % of valve closing Fig. 5: Variation of water hammer pressure along the percentage of valve closing 3. VARIATION OF WATER HAMMER PRESSURE ALONG THE PERCENTAGE OF VALVE OPENING Figure shows the variation of water hammer pressure along the percentage of valve opening. Experiments were carried out to find out water hammer pressure for the different valve opening. Here valve 19 Page

5 Negative WHP (m. of wc ) Negative WHP (m. of wc ) IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) opening time is.3sec,.5sec,.sec, and.7sec for 5%, 5%, 75%, and 1% of valve opening respectively. In this fig. graph represents arithmetic WHP, experimental WHP, method of characteristic WHP, and theoretical WHP % of valve opening Fig. : Variation of water hammer pressure along the percentage of valve opening Graph shows the reasonable agreement of method of characteristic, arithmetic method and theoretical method. However experimental results agree reasonably well with the theoretical and analytical analysis. In case of different percentage of valve opening negative water hammer pressure generated. 3.5 VARIATION OF WATER HAMMER PRESSURE ALONG THE PERCENTAGE OF VALVE OPENING FOR THE ANOTHER SET OF VALVE OPENING TIME Figure 7 shows the variation of water hammer pressure along the percentage of valve opening. Here experiments carried out for another set of valve opening time. Valve opening time is.9sec, 1.sec,.1sec, and.5sec for 5%, 5%, 75%, and 1% of valve opening respectively. In this fig. graph represents arithmetic WHP, method of characteristic WHP, experimental WHP, and theoretical WHP. This fig. shows good agreement of the experimental method, method of characteristic and theoretical method to each other at 5%, 5%, 75%, and 1% of valve opening. It has been concluded that arithmetic method does not show the good agreement with results obtained from the other methods. It implies that the arithmetic method is not suitable for very slow valve opening % of valve opening Fig. 7: Variation of water hammer pressure along the percentage of valve opening IV. CONCLUSION Experiments for analysis of water hammer pressure in a commercial pipe were conducted and analytical and theoretical methods were used for different percentage of valve closing and opening. The following conclusions are drawn from the studies. Page

6 IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) 1. Water hammer pressure increases in a commercial pipe with percentage increase of valve closing/opening.. Water hammer pressure depends upon the valve closing/opening time. It was observed that WHP is more when valve closing/opening time is less. 3. Water hammer pressure is maximum when flow control valve is fully and suddenly closed.. From the present investigation, it is found that arithmetic method gives good agreement with the actual results only when the time taken to close or open the valve is.7 sec. However arithmetic method is not suitable for very slow valve closer (.7sec). 5. It was found that method of characteristic gives good agreement with theoretical values for any valve closing/opening time. REFERENCES [1] Afshar M. H., and M. Rohani, Water hammer simulation by implicit method of characteristic, Department of Civil Engineering, Iran [] University of Science and Technology, Narmak, Tehran, Iran, [3] Batterton Shawn, Water Hammer: An Analysis of Plumbing Systems, Intrusion, and Pump Operation, Thesis on Master of Science In [] Civil Engineering of Virginia Polytechnic Institute, Blacksburg Virginia,. [5] Bergant A., A. R. Simpson, and A.S. Tijsseling, Water Hammer With Column Separation, Journal of Fluids and Structures,135 [] 171,. [7] Dudlik, A., Scho nfeld S.B.H., Hagemann, O., and Fahlenkamp H,, Water hammer and cavitational hammer in process plant pipe [] systems, Kerntechnik (3), 91 9, 3. [9] Ferrante M., and Brunone B., Pipe System Diagnosis and Leak Detection by Unsteady-State Tests 1: Harmonic Analysis, Adv. [1] Water Resour., pp ,. [11] Ghidaoui M. S., and Kolyshki, A. A., Stability Analysis of Velocity Profiles in Water-Hammer Flows, J. Hydraul. Eng. 17~!, pp. [1] 99 51, 1. [13] Ghidaoui M.S., Zhao M., McInnis D.A., and Axworthy D.H., A review of water hammer theory and practice, ASME Appl Mech Rev [1] 5;5(1):9 7, 5. [15] Izquierdo J., and P.L. Iglesias, Mathematical Modeling of Hydraulic Transient in Simple Systems, Fluid Mechanics Group, [1] Polytechnic University of Valencia, Spain, 1. [17] Izquierdo, J. and P.L. Iglesias, Mathematical Modeling of Hydraulic Transient in Complex Systems, Fluid Mechanics Group, [1] Polytechnic University of Valencia, Spain, 3. [19] Liou, J. and Parks, D. Water Hammer Induced by a Line Break. Pipelines, pp doi 1.11/ , 1. 1 Page

### RESEARCH OF BLOCKAGE SEGMENT DETECTION IN WATER SUPPLY PIPELINE BASED ON FLUID TRANSIENT ANALYSIS ABSTRACT

RESEARCH OF BLOCKAGE SEGMENT DETECTION IN WATER SUPPLY PIPELINE BASED ON FLUID TRANSIENT ANALYSIS Ying Xu 2, Yuebin Wu 1, Liang Chen 1, Yun Guo 2, Wei Wang 1 and Zhe Ding 2 1 School of Architecture, Harbin

### Unsteady Flow in Pipes

The Islamic University of Gaza Faculty of Engineering Civil Engineering Department Hydraulics - ECIV 3322 Chapter 4 Unsteady Flow in Pipes Water Hammer Phenomenon in pipelines A sudden change of flow rate

### UNIT 15 WATER HAMMER AND SURGE TANKS

UNT 15 WATER HAMMER AND SURGE TANKS Structure 15.1 ntroduction Objectives 15.2 Water Hammer 15.2.1 Expression for Rise in Pressure 15.3 Rapid Acceleration of Flow 15.4 Surge Tanks 15.5 Summary 15.6 Keywords

### Laboratory studies of water column separation

IOP Conference Series: Materials Science and Engineering OPEN ACCESS Laboratory studies of water column separation To cite this article: R Autrique and E Rodal 2013 IOP Conf. Ser.: Mater. Sci. Eng. 52

### PRESSURE SURGES IN PIPELINES

CHAPTER 4 PRESSURE SURGES IN PIPELINES 4.1 FEATURES OF PRESSURE SURGE In the past, water engineers were facing problems with repeated pipe bursts, failing seals etc. They termed the cause of failure as

### CFD Analysis of the Anti-Surge Effects by Water Hammering

IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS CFD Analysis of the Anti-Surge Effects by Water Hammering To cite this article: Tae-oh Kim et al 2015 IOP Conf. Ser.: Mater. Sci.

### Effect of Fluid Density and Temperature on Discharge Coefficient of Ogee Spillways Using Physical Models

RESEARCH ARTICLE Effect of Fluid Density and Temperature on Discharge Coefficient of Ogee Spillways Using Physical Models M. SREENIVASULU REDDY 1 DR Y. RAMALINGA REDDY 2 Assistant Professor, School of

### DEVELOPMENTS IN PIPELINE FILLING AND EMPTYING EXPERIMENTATION IN A LABORATORY PIPELINE APPARATUS

6 th IAHR International Meeting of the Workgroup on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems, September 9-11, 2015, Ljubljana, Slovenia DEVELOPMENTS IN PIPELINE FILLING AND EMPTYING

### Effect of Pump Inertia & Valve Closure time on the Transient Flow Condition of a Water Supply Network: A Case Study

Effect of Pump Inertia & Valve Closure time on the Transient Flow Condition of a Water Supply Network: A Case Study Sachin Kumar 1, Dr. Ruchi Khare 2 1Student of MTech (WRE), 2Faculty of Civil Engineering,

### Homework of Chapter (4.2,4.3)

Dead Line: Saturday (24/3/2018) The Islamic University of Gaza, Instructors: Dr. Khalil M. Al Astal Civil Engineering Department, Hydraulics -Discussion, Second semester, 2018. T.A: Eng. Mohammed AbuRahma

### Transient Analysis and Design Considerations for Hydraulic Pipelines. Jonathan Funk, EIT

Transient Analysis and Design Considerations for Hydraulic Pipelines Jonathan Funk, EIT Transient Analysis 2 Objectives Develop an intuitive understanding of water hammer and transient response Present

### Journal of Applied Fluid Transients, Vol 1-1, April 2014 (3-1)

Modeling and Field Verification Study of Air Slam Conditions on kalanit Pipeline System By Yiftach Brunner & Sathish Kumar ir valves are integral part of long water transmission mains and are essential

### International Journal of Technical Research and Applications e-issn: , Volume 4, Issue 3 (May-June, 2016), PP.

DESIGN AND ANALYSIS OF FEED CHECK VALVE AS CONTROL VALVE USING CFD SOFTWARE R.Nikhil M.Tech Student Industrial & Production Engineering National Institute of Engineering Mysuru, Karnataka, India -570008

### Water Hammer In Irrigation Systems 1

CIR828 1 G. A. Clark and D. Z. Haman 2 Irrigation system design includes pump sizing and selection, valve sizing and selection, and pipe sizing as well as the proper selection and placement of many other

### ISSN: Page 410

Study of Structural Stability of Globe Valve in Petroleum and Sugar Industries Anil Rathod 1, Dr. S N Kurbet 2 1 PG Student Mechanical branch (machine Design) BEC Bagalkot, Karnataka India, 2 HOD of Mechanical

### Experimental investigation of the check valve behaviour when the flow is reversing

EPJ Web of Conferences, (7) DOI:./ epjconf/7 EFM Experimental investigation of the valve behaviour when the flow is reversing D. Himr a,v.habán, M. Hudec, and V. Pavlík Brno University of Technology, Faculty

### Tirpur Area Water Supply Project A Report on Transient Modeling Study

y February 2008 1 of 81 y INTRODUCTION: The report presents results from a transient modeling study conducted on the clear water transmission main of Tirpur Areas Water Supply Project, Tamilnadu, India.

### Courses of Instruction: Controlling and Monitoring of Pipelines

Courses of Instruction: Controlling and Monitoring of Pipelines Date December 2010 Dr. Peter Eschenbacher Partner Angergraben 4 85250 Altomünster Germany Tel. +49-(0)8254 / 99 69 57 Fax +49-(0)8254 / 99

### Numerical simulation of the ALBA s synchrotron cooling system response to pump start-up and shut-down Page 1

Numerical simulation of the ALBA s synchrotron cooling system response to pump start-up and shut-down Page 1 Abstract This project consists of the development and validation of a numerical model to simulate

### INTEGRITY, SAFETY AND EFFICIENCY IN LNG TRANSFER IMPACT OF EMERGENCY SHUTDOWN AND RELEASE OPERATIONS

INTEGRITY, SAFETY AND EFFICIENCY IN LNG TRANSFER IMPACT OF EMERGENCY SHUTDOWN AND RELEASE OPERATIONS Evert van Bokhorst Frank Driessen Erik Nennie David Remans Jan Smeulers TNO Technical Sciences Delft,

### Leak Detection in Pipeline System Based on Flow Induced Vibration Methodology in Pipeline

Leak Detection in Pipeline System Based on Flow Induced Vibration Methodology in Pipeline Mohammad Rizwan 1, Immanuel Dinesh Paul 2 1 M.Tech Research Scholar, Vel Tech University, Department of Electronics

### Suppress Your Surges: Surge Suppression Fundamentals. April 13, 2017

Suppress Your Surges: Surge Suppression Fundamentals April 13, 2017 How Bad Can Waterhammer Really Be? 2 Workshop Agenda What is waterhammer? Causes of waterhammer Instantaneous surge pressures Surges

### Characteristics of Decompression Tank Internally Pressurized With Water Using OpenFOAM Syamsuri 1, a

Applied Mechanics and Materials Submitted: 2015-11-26 ISSN: 1662-7482, Vol. 836, pp 3-8 Accepted: 2016-01-27 doi:10.4028/www.scientific.net/amm.836.3 Online: 2016-06-01 2016 Trans Tech Publications, Switzerland

### Applied Fluid Mechanics

Applied Fluid Mechanics 1. The Nature of Fluid and the Study of Fluid Mechanics 2. Viscosity of Fluid 3. Pressure Measurement 4. Forces Due to Static Fluid 5. Buoyancy and Stability 6. Flow of Fluid and

### Tutorial. BOSfluids. Relief valve

Tutorial Relief valve The Relief valve tutorial describes the theory and modeling process of a pressure relief valve or safety valve. It covers the algorithm BOSfluids uses to model the valve and a worked

### Reproducing Failure Mode and Life Prediction of Expansion Joint Using Field Data

International Journal of Mechanical Engineering and Applications 2018; 6(1): 13-17 http://www.sciencepublishinggroup.com/j/ijmea doi: 10.11648/j.ijmea.20180601.12 ISSN: 2330-023X (Print); ISSN: 2330-0248

### Experimental Verification of Integrated Pressure Suppression Systems in Fusion Reactors at In-Vessel Loss-of -Coolant Events

Experimental Verification of Integrated Pressure Suppression Systems in Fusion Reactors at In-Vessel Loss-of -Coolant Events K. Takase 1), H. Akimoto 1) 1) Japan Atomic Energy Research Institute (JAERI),

### Sizing Pulsation Dampeners Is Critical to Effectiveness

Sizing Pulsation Dampeners Is Critical to Effectiveness Pressure variation is an important consideration when determining the appropriate size pulsation dampener needed for an application. by David McComb,

### ADVANCES in NATURAL and APPLIED SCIENCES

ADVANCES in NATURAL and APPLIED SCIENCES ISSN: 1995-0772 Published BYAENSI Publication EISSN: 1998-1090 http://www.aensiweb.com/anas 2017 June 11(8): pages 408-415 Open Access Journal Design of Absorptive

### Transitional Steps Zone in Steeply Sloping Stepped Spillways

Transitional Steps Zone in Steeply Sloping Stepped Spillways Jalal Attari 1 and Mohammad Sarfaraz 2 1- Assistant Professor, Power and Water University of Technology, Iran 2- Graduate Student, Department

### Experimental Investigation Of Flow Past A Rough Surfaced Cylinder

(AET- 29th March 214) RESEARCH ARTICLE OPEN ACCESS Experimental Investigation Of Flow Past A Rough Surfaced Cylinder Monalisa Mallick 1, A. Kumar 2 1 (Department of Civil Engineering, National Institute

### Experimental Study of an Air Lift Pump

Engineering, Technology & Applied Science Research Vol. 7, No. 3, 217, 1676-168 1676 Experimental Study of an Air Lift Pump Fawzy Sh. Abou Taleb Mechanical Engineering Department Engineering College Northern

### MODELING AND SIMULATION OF VALVE COEFFICIENTS AND CAVITATION CHARACTERISTICS IN A BALL VALVE

Proceedings of the 37 th International & 4 th National Conference on Fluid Mechanics and Fluid Power FMFP2010 December 16-18, 2010, IIT Madras, Chennai, India FMFP2010 341 MODELING AND SIMULATION OF VALVE

### Design, Static Structural & Model Analysis of Water Ring Vacuum Pump Impeller

IJSRD - International Journal for Scientific Research & Development Vol. 6, Issue 03, 2018 ISSN (online): 2321-0613 Design, Static Structural & Model Analysis of Water Ring Vacuum Pump Impeller Ajay A.

### DESIGN OF[LRA2] PIPING SYSTEMS FOR DYNAMIC LOADS FROM FLUID TRANSIENTS[LRA3]

ASME B31D, Draft, Revision 8, 4/6/014, RAL ASME B31D-TBD[LRA1] DESIGN OF[LRA] PIPING SYSTEMS FOR DYNAMIC LOADS FROM FLUID TRANSIENTS[LRA3] ASME Code for Pressure Piping, B31 AN A M E R I C A N NAT I O

### Characterizing Flow Losses Occurring in Air Vents and Ejector Pins in High Pressure Die Castings

This paper is subject to revision. Statements and opinions advanced in this paper or during presentation are the author s and are his/her responsibility, not the Association s. The paper has been edited

### Experiment (13): Flow channel

Experiment (13): Flow channel Introduction: An open channel is a duct in which the liquid flows with a free surface exposed to atmospheric pressure. Along the length of the duct, the pressure at the surface

### THE INFLOW OF UNWANTED AIR

IN PRESSURIZED PIPES The main reason for the inflow of air in public water distribution systems is excessive water velocity. Air traveling with water in pressurized pipes can result in high turbulence

### Experiment 8: Minor Losses

Experiment 8: Minor Losses Purpose: To determine the loss factors for flow through a range of pipe fittings including bends, a contraction, an enlargement and a gate-valve. Introduction: Energy losses

### Experimental Investigation on Changes of Water Surface Profile with Gaussian Shaped Bottom and Side Roughness

Experimental Investigation on Changes of Water Surface Profile with Gaussian Shaped Bottom and Side Md. Rafiue Islam a, Shariful Islam b*, Md. Abdul Qaiyum Talukder c, S. M. Rezwan Hossain d Abstract Bed

### Hard or Soft Shut-in : Which is the Best Approach?

HARD - SOFT shut-in? Hard or Soft Shut-in : Which is the Best Approach? March '93 INTRODUCTION There is now reasonable acceptance through-out the industry for the use of a hard shut-in procedure following

### Study on Stress Analysis of Araldite HY-951 and CY-230 Bell Crank Lever using Photoelasticity and FEM

Study on Stress Analysis of Araldite HY-951 and CY-230 Bell Crank Lever using Photoelasticity and FEM Prasanth Kumar Mallipudi L.Dinesh Anil Neerukonda Institute of Technology and Sciences, Sangivalasa,

### Using sea bed roughness as a wave energy dissipater

Island Sustainability II 203 Using sea bed roughness as a wave energy dissipater T. Elgohary 1, R. Elgohary 1 & M. Hagrass 2 1 Department of Civil Engineering (Irrigation and Hydraulic), The Tenth of Ramadan

### The API states the following about tube rupture for a shell-and-tube heat exchangers:

Tutorial This tutorial describes the theory and modeling process of a tube rupture event using the special element type Rupture element in BOSfluids. It covers the algorithm BOSfluids uses to model the

### PIG MOTION AND DYNAMICS IN COMPLEX GAS NETWORKS. Dr Aidan O Donoghue, Pipeline Research Limited, Glasgow

PIG MOTION AND DYNAMICS IN COMPLEX GAS NETWORKS Dr Aidan O Donoghue, Pipeline Research Limited, Glasgow A model to examine pigging and inspection of gas networks with multiple pipelines, connections and

### Flow transients in multiphase pipelines

Flow transients in multiphase pipelines David Wiszniewski School of Mechanical Engineering, University of Western Australia Prof. Ole Jørgen Nydal Multiphase Flow Laboratory, Norwegian University of Science

### Analysis of Shear Lag in Steel Angle Connectors

University of New Hampshire University of New Hampshire Scholars' Repository Honors Theses and Capstones Student Scholarship Spring 2013 Analysis of Shear Lag in Steel Angle Connectors Benjamin Sawyer

### Unit 24: Applications of Pneumatics and Hydraulics

Unit 24: Applications of Pneumatics and Hydraulics Unit code: J/601/1496 QCF level: 4 Credit value: 15 OUTCOME 2 TUTORIAL 9 ACCUMULATORS The material needed for outcome 2 is very extensive so there are

### SOME TECHNICAL AND PRACTICAL RECOMMENDATIONS ABOUT PULSATION DAMPENERS IN CIRCUITS WITH DOSING OR VOLUMETRIC PUMPS

1 SOME TECHNICAL AND PRACTICAL RECOMMENDATIONS ABOUT PULSATION DAMPENERS IN CIRCUITS WITH DOSING OR VOLUMETRIC PUMPS DESCRIPTION OF A PULSATION DAMPENER AND HOW IT WORKS A pulsation dampener is a vessel

### Thermodynamic Study of Compartment Venting

Thermodynamic Study of Compartment Venting Francisco Manuel Bargado Benavente francisco.benavente@tecnico.ulisboa.pt Instituto Superior Técnico, Universidade de Lisboa Lisbon, Portugal Abstract Compartment

### AIRFLOW GENERATION IN A TUNNEL USING A SACCARDO VENTILATION SYSTEM AGAINST THE BUOYANCY EFFECT PRODUCED BY A FIRE

- 247 - AIRFLOW GENERATION IN A TUNNEL USING A SACCARDO VENTILATION SYSTEM AGAINST THE BUOYANCY EFFECT PRODUCED BY A FIRE J D Castro a, C W Pope a and R D Matthews b a Mott MacDonald Ltd, St Anne House,

### Plane Turbulent Wall Jets in Limited Tailwater Depth

International Journal of Engineering & Technology IJET-IJENS Vol: 11 No: 159 Plane Turbulent Wall Jets in Limited Tailwater Depth Shazy A. Shabayek 1 Abstract This paper presents laboratory study of plane

### Fitness for Service Assessment of Ageing Pressure Vessel Experiencing External Corrosion: A Case Study

The International Journal Of Engineering And Science (IJES) Volume 6 Issue 2 Pages PP 12-16 2017 ISSN (e): 2319 1813 ISSN (p): 2319 1805 Fitness for Service Assessment of Ageing Pressure Vessel Experiencing

### Modeling a Pressure Safety Valve

Modeling a Pressure Safety Valve Pressure Safety Valves (PSV), Pressure Relief Valves (PRV), and other pressure relieving devices offer protection against overpressure in many types of hydraulic systems.

### Variation in Pressure in Liquid-Filled Plastic Film Bags Subjected to Drop Impact

Materials Transactions, Vol. 53, No. 2 (12) pp. 291 to 295 Special Issue on APCNDT 9 12 The Japanese Society for Non-Destructive Inspection Variation in Pressure in Liquid-Filled Plastic Film Bags Subjected

### CFD Analysis ofwind Turbine Airfoil at Various Angles of Attack

IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) e-issn: 2278-1684,p-ISSN: 2320-334X, Volume 13, Issue 4 Ver. II (Jul. - Aug. 2016), PP 18-24 www.iosrjournals.org CFD Analysis ofwind Turbine

### Application Worksheet

Application Worksheet All dimensions are nominal. Dimensions in [ ] are in millimeters. Service Conditions Medium Through Valve: Required C v : Temperature Maximum: Minimum: Normal: Flow Maximum: Minimum:

### FLUID POWER FLUID POWER EQUIPMENT TUTORIAL ACCUMULATORS. This work covers part of outcome 2 of the Edexcel standard module:

FLUID POWER FLUID POWER EQUIPMENT TUTORIAL ACCUMULATORS This work covers part of outcome 2 of the Edexcel standard module: UNIT 21746P APPLIED PNEUMATICS AND HYDRAULICS The material needed for outcome

### Cavitation in Valves

VM CAV/WP White Paper Cavitation in Valves Table of Contents Introduction............................... 2 Cavitation Analysis.......................... 2 Cavitation Data............................. 3

### 6 th International Conference on Trends in Agricultural Engineering 7-9 September 2016, Prague, Czech Republic

EQUIPMENT FOR TESTING STABLE FLOOD DEFENSES L. Ševčík Technical university in Liberec, Liberec, Czech Republic Abstract Issues of the impactor testing flood defenses in this contribution. By impactor will

### H16 Losses in Piping Systems

H16 Losses in Piping Systems The equipment described in this manual is manufactured and distributed by TECQUIPMENT LIMITED Suppliers of technological laboratory equipment designed for teaching. BONSALL

### Computational fluid dynamics analysis of a mixed flow pump impeller

MultiCraft International Journal of Engineering, Science and Technology Vol. 2, No. 6, 2010, pp. 200-206 INTERNATIONAL JOURNAL OF ENGINEERING, SCIENCE AND TECHNOLOGY www.ijest-ng.com 2010 MultiCraft Limited.

### DEVELOPMENT OF HIGH ALTITUDE TEST FACILITY FOR COLD JET SIMULATION

DEVELOPMENT OF HIGH ALTITUDE TEST FACILITY FOR COLD JET SIMULATION Aldin Justin 1, Robin James, Shruti Panicker 2,A.N.Subash,Saravana Kumar 1 Assistant Professor,Karunya University, aldinjustin@karunya.edu

### An experimental study of internal wave generation through evanescent regions

An experimental study of internal wave generation through evanescent regions Allison Lee, Julie Crockett Department of Mechanical Engineering Brigham Young University Abstract Internal waves are a complex

### Dynamic water behaviour due to one trapped air pocket in a laboratory pipeline apparatus

IOP Conference Series: Earth and Environmental Science PAPER OPEN ACCESS Dynamic water behaviour due to one trapped air pocket in a laboratory pipeline apparatus To cite this article: A Bergant et al 2016

### FIRE PROTECTION. In fact, hydraulic modeling allows for infinite what if scenarios including:

By Phil Smith, Project Manager and Chen-Hsiang Su, PE, Senior Consultant, Lincolnshire, IL, JENSEN HUGHES A hydraulic model is a computer program configured to simulate flows for a hydraulic system. The

### Lab # 03: Visualization of Shock Waves by using Schlieren Technique

AerE545 Lab # 03: Visualization of Shock Waves by using Schlieren Technique Objectives: 1. To get hands-on experiences about Schlieren technique for flow visualization. 2. To learn how to do the optics

### 2016 Webinar Sponsors

Copyright 2016 American Water Works Association 2016 Webinar Sponsors 2 Please consider the environment before printing. 1 Webinar Moderator Alex Gerling ReuseEngineer American Water Works Association

### Modelling of the Separated Geothermal Water Flow between Te Mihi flash plants

Proceedings World Geothermal Congress 2015 Melbourne, Australia, 19-25 April 2015 Modelling of the Separated Geothermal Water Flow between Te Mihi flash plants Kevin Koorey, Kim Harwood and Norman Lawgun

### Transactions on Ecology and the Environment vol 12, 1996 WIT Press, ISSN

Open boundary condition for unsteady open-channel flow K. Mizumura Civil Engineering Department, Kanazawa Institute of Technology, 7-1 Ogigaoka, Nonoichimachi, Ishikawa Pref. 921, Japan Abstract Initial

### EN M '

THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS 345 E. 47th St New York, N.Y. 10017 The Society shall not be responsible for statements or opinions advancedin papers or &Scission at meetings of the Society

### The Future of Hydraulic Control in Water-Systems

The Future of Hydraulic Control in Water-Systems A. Heimann Manager of R&D and of Technical Support & Applications Engineering departments at Dorot Automatic Control Valves Dorot Control Valves, Kibbutz

### Free Surface Flow Simulation with ACUSIM in the Water Industry

Free Surface Flow Simulation with ACUSIM in the Water Industry Tuan Ta Research Scientist, Innovation, Thames Water Kempton Water Treatment Works, Innovation, Feltham Hill Road, Hanworth, TW13 6XH, UK.

### Effect of channel slope on flow characteristics of undular hydraulic jumps

River Basin Management III 33 Effect of channel slope on flow characteristics of undular hydraulic jumps H. Gotoh, Y. Yasuda & I. Ohtsu Department of Civil Engineering, College of Science and Technology,

### ASSE International Product (Seal) Listing Program

ASSE International Product (Seal) Listing Program ASSE 1070-2015 / ASME A112.1070-2015 / CSA B125.70-15 Performance Requirements for Water Temperature Limiting Devices Manufacturer: Contact Person: E-mail:

### EXPERIMENTAL STUDY ON BEESWAX USING WATERJET DRILLING

In: Journal of Characterization and Development of Novel Materials ISSN: 1937-7975 Volume 1, Issue 4, pp. 285 296 2010 Nova Science Publishers, Inc. EXPERIMENTAL STUDY ON BEESWAX USING WATERJET DRILLING

### Fluid Flow. Link. Flow» P 1 P 2 Figure 1. Flow Model

Fluid Flow Equipment: Water reservoir, output tubes of various dimensions (length, diameter), beaker, electronic scale for each table. Computer and Logger Pro software. Lots of ice.temperature probe on

### Transient Analyses In Relief Systems

Transient Analyses In Relief Systems Dirk Deboer, Brady Haneman and Quoc-Khanh Tran Kaiser Engineers Pty Ltd ABSTRACT Analyses of pressure relief systems are concerned with transient process disturbances

### STUDY OF SLUG CONTROL TECHNIQUES IN PIPELINE SYSTEMS

STUDY OF SLUG CONTROL TECHNIQUES IN PIPELINE SYSTEMS JOSÉ L. A,VIDAL Petrobrás Research Center - CENPES/PDEP/TOOL Av.Horácio de Macedo 95- Cidade Universitária 191-915 -Rio de Janeiro-RJ E-mail:josearias@petrobras.com.br

### Engineering / Technical Section

TABLE OF CONTENTS Valve Dimensions...E-2 ANSI Flange Data...E-3 Performance Charts...E-4 - E-8 Cavitation Information...E-9 Metric Valve Dimensions...E-10 DIN Flange Data...E-11 - E-12 Metric Conversion

### AN ANALYSIS ON HIGH PRESSURE DYNAMIC CALIBRATORS USED IN THE DEFENSE AREAS

AN ANALYSIS ON HIGH PRESSURE DYNAMIC CALIBRATORS USED IN THE DEFENSE AREAS Sung Soo HongPresenter Agency for Defense Development, Taean, 357-942, South Korea sungsoo@add.re.kr Abstract Up to now, there

### A SEMI-PRESSURE-DRIVEN APPROACH TO RELIABILITY ASSESSMENT OF WATER DISTRIBUTION NETWORKS

A SEMI-PRESSURE-DRIVEN APPROACH TO RELIABILITY ASSESSMENT OF WATER DISTRIBUTION NETWORKS S. S. OZGER PhD Student, Dept. of Civil and Envir. Engrg., Arizona State Univ., 85287, Tempe, AZ, US Phone: +1-480-965-3589

### Pressure surge absorption

Pressure surge absorption Product range for drinking water, waste water and the chemical industry With remote monitoring, everything is fully under control. Willy Zahnd, WARET AG PRESSURE SURGE ABSORPTION

### Hydraulic transients, also known as pressure

FWRJ Surge Protections: Modeling vs. Design vs. Construction Jinsheng Huo Hydraulic transients, also known as pressure surge or water hammer, are the timevarying phenomena that occur when the equilibrium

### Results of mathematical modelling the kinetics of gaseous exchange through small channels in micro dischargers

Journal of Physics: Conference Series PAPER OPEN ACCESS Results of mathematical modelling the kinetics of gaseous exchange through small channels in micro dischargers Related content - The versatile use

### Flow Field Investigation of Flat Bottom Aerofoil under Ground Effect

IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) e-issn: 2278-1684,p-ISSN: 2320-334X, Volume 12, Issue 4 Ver. VI (Jul. - Aug. 2015), PP 83-88 www.iosrjournals.org Flow Field Investigation of

### The origin of gas pulsations in rotary PD compressors: ΔP or ΔU?

IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS The origin of gas pulsations in rotary PD compressors: ΔP or ΔU? To cite this article: P X Huang et al 2015 IOP Conf. Ser.: Mater.

### DAV - P. Product Catalogue DAV - P. Air release & Vacuum Break Valves. (Plastic Air Valves) DAV - P. Edition 2012

Product Catalogue DAV - P DAV - P Air release & Vacuum Break Valves Edition 1 DAV - P (Plastic Air Valves) DAV Series Overview General The presence of trapped air in a pressurized pipeline can have serious

### INTERACTION BETWEEN WIND-DRIVEN AND BUOYANCY-DRIVEN NATURAL VENTILATION Bo Wang, Foster and Partners, London, UK

INTERACTION BETWEEN WIND-DRIVEN AND BUOYANCY-DRIVEN NATURAL VENTILATION Bo Wang, Foster and Partners, London, UK ABSTRACT Ventilation stacks are becoming increasingly common in the design of naturally

### Computer Simulation Helps Improve Vertical Column Induced Gas Flotation (IGF) System

JOURNAL ARTICLES BY FLUENT SOFTWARE USERS JA187 Computer Simulation Helps Improve Vertical Column Induced Gas Flotation (IGF) System Computer simulation has helped NATCO engineers make dramatic improvements

### Experimental Investigation on Transient Response of Two Stage Pressure Relief Valve

Experimental Investigation on Transient Response of Two Stage Pressure Relief Valve Prof. Basavaraj V.HUBBALLI 1, Dr. Vilas B.SONDUR 2 1 Jain College of Engineering, Belagavi Karnataka, India, bvhubliabhi@gmail.com

### Performance Improvement of Ranque-Hilsch Vortex Tube by Varying inside Surface Roughness of Hot Tube

P P Performance Improvement of Ranque-Hilsch Vortex Tube by Varying inside Surface Roughness of Hot Tube 1 1 2 R.Madhu KumarP P, N.V.V.S.SudheerP PSchool of Mechanical Engineering, R.G.M. College of Engineering

### 44 (0) E:

FluidFlow Relief Valve Sizing Handbook Flite Software 2016 Flite Software N.I. Ltd, Block E, Balliniska Business Park, Springtown Rd, Derry, BT48 0LY, N. Ireland. T: 44 (0) 2871 279227 E: sales@fluidflowinfo.com

### FEA ANALYSIS OF PRESSURE VESSEL WITHDIFFERENT TYPE OF END CONNECTIONS

FEA ANALYSIS OF PRESSURE VESSEL WITHDIFFERENT TYPE OF END CONNECTIONS Deval Nitin Bhinde 1 and Rajanarsimha S. 2 1 MTech CAD-CAM & Robotics, 2 Facculty, Department of Mechanical Engineering K.J. Somaiya

### CVEN 311 Fluid Dynamics Fall Semester 2011 Dr. Kelly Brumbelow, Texas A&M University. Final Exam

CVEN 311 Fluid Dynamics Fall Semester 2011 Dr. Kelly Brumbelow, Texas A&M University Final Exam 8 pages, front & back, not including reference sheets; 21 questions An excerpt from the NCEES Fundamentals

### LOW PRESSURE EFFUSION OF GASES revised by Igor Bolotin 03/05/12

LOW PRESSURE EFFUSION OF GASES revised by Igor Bolotin 03/05/ This experiment will introduce you to the kinetic properties of low-pressure gases. You will make observations on the rates with which selected